of 12 seats affecting 18 different states. those states gaining seats include arizona, florida, georgia, nevada, south carolina, texas, utah, and washington. as you can see on the graphic. those losing seats are illinois, iowa, louisiana, massachusetts, michigan, missouri, new jersey, new york, ohio, and pennsylvania. for 32 states, there is no change. texas gained the most seats this decade, a total four, and indeed has gained seats for seven consecutive decades. the next graphic shows the national staff shot of the 2010 census apportionment of the u.s. house of representatives. california will have 53 seats. texas will have 36. new york and florida will each have 27. seven states will have only one representative. the average population size of each house district will be 710,767 persons, and this is up from 646,952 at this time in 2000. i might note that in 1790, each representative represented 34,000 people overall. population change. over the last 100 years, the rate of growth of the u.s. population has gradually slowed, and this is as you can see from the red line on this graphic.